is the use of a black background which emphasizes both the grey and blue sections.

2. By alternating light and dark, it is

possible to make two colors do the work of four. Jnrrrtm^ifomi rtotocutrwi

v^Tmow 'iimtac

U. S. Department of Labor, Bureau of Labor StatUtict, "Labor Information Bulletin," October, 1936.

SCALE .4

C. Total Cost of Direct Labor and Materials on PWA Construction Projects, 1933- 1936.

1. The use of many circles and the arrangement of each one makes this an interesting

group of charts.

2. In order to aid in comparing one circle with another, it might have been better to have

a common starting point, that is, to have the black section of each circle start at the top center as in 84.

3. Note that the numbers beneath the circle give the amount of money spent for each

purpose, but have no bearing on the size of the circles.

SECTOR CHARTS

SALES DOLLAR

INVESTED DOLLAR

4.3« Profit

During the period 1923-1934 (latest figures available) the average profit in the manufacturing industries was equal to 4.2$ for each sales dollar, or 4.3( for each invested dollar

Factory Management and. Maintenance. October, 1938, Part of an Editorial on Public Relationt Entitled, "A Program for Public-Relation*."

Percentage of Profit from a Sales Dollar and an Invested Dollar.

1. The use of a dollar or other coin in place of a circle adds to the effectiveness of a sector

chart.

2. It might have been better to place the section labelled "Profit" at the 12 o'clock mark.